If you got your ecommerce system from a vendor in the form of a download directory or even an old-fashioned CD/DVD distribution kit, you could use IaaS as the most basic (but not the simplest) cloud model and an alternative to deploying servers and software on-premises.
What is IaaS? For Infrastructure as a Service (IaaS), the data center provides servers, as well as disk storage and multigigabit network connectivity, to the Internet backbone.
In Iaas, your organization pays for the provider's services on an operating cost basis (OpEx), or in other words, as a pay-as-you-go subscription. This payment method applies to any of the FaaS, PaaS, SaaS, or IaaS cloud models. Pay-as-you-go frees up the company's budget from capital expenditures (CapEx) for purchasing its own servers and other IT equipment.
In today's data centers, the IaaS service model allows the rented IT resources to be scaled up and down according to the progress of projects, as well as increasing or decreasing workload. You will be offered services that help prepare new applications to install – analytic dashboards that show server load and network traffic. A very important advantage of IaaS is the high availability of infrastructure in Tier III or Tier IV data centers with the redundancy of all engineering systems. The implementation of IT infrastructure on-premises with such high reliability is either impossible or would be extremely expensive.
A feature of IaaS, in contrast to the other 3 models of cloud services – FaaS, PaaS, and SaaS – is only the rental of hardware and a network connection to the Internet. The software, including the OS, according to the IaaS service model, is installed by your company, and the data center is not responsible for the valid operation of these applications.
However, if your IT team does not have people to set up servers in the provider's IaaS cloud, this is not a problem. The operating system, virtualization, and other basic software can be purchased from the data center and you can order the services of a system administrator or a network engineer to install and configure all required software.
If you ask in what case the cloud-based IaaS model can be recommended, this is when a platform purchased from a vendor offers an ecommerce solution as a cloud-ready, do-it-yourself installation. The possibilities for customizing the solution with the IaaS model are high, especially if the solution has open-source code. The vendor can often recommend an implementation partner who will carry out a customization project for the purchased ecommerce platform.
The advantage of the IaaS model is that you retain full control over hardware and applications, especially if your company has a professional IT team. This is also a disadvantage, since your company will bear the cost of wages for programmers, DevOps, network engineers, and administrators. There could also be losses from downtime and denial of service due to incorrect configuration of the servers, storage, network stacks, software installation, or updates made by your team.